Abstract: Per default some weak ciphers & protocols for SSL communications are enabled on an Windows 2012 R2 OS which is used for an Microsoft SharePoint (2013/2016) environment. To improve the security from the OS and all connections from and towards an Microsoft SharePoint environment they should be disabled (this is also required to pass the PCI DSS validation).

To do that copy the entry's from the following section to a *.reg file and run that on the Windows 2012 R2 OS.

As the config above would limit the server to only some ciphers and also to some protocols make sure the other ones are still enabled to avoid connection issues. To do that you could copy the entry's from the following section to a *.reg file and run that on your Windows 2012 R2 OS.